body {
            background-size: cover;
            min-height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        
        }
        .overlay {
            background-color: rgba(0, 0, 0, 0.3); /* negro semi-transparente */
            min-height: 100vh;
            padding-top: 20px;
            padding-bottom: 50px;
        }



        
        .card {
            border-radius: 10px;
            box-shadow: 0 5px 25px rgba(0, 0, 0, 0.08);
            border: none;
            overflow: hidden;
        }
        
        .card-header {
            background-color: #ffffff;
            color: #2c3e50;
            border-bottom: 1px solid #eaeaea;
            padding: 25px 30px;
        }
        
        .card-header h3 {
            font-weight: 600;
            font-size: 1.6rem;
        }
        
        .card-body {
            padding: 30px;
        }
        
        .form-control, .form-select {
            border-radius: 6px;
            padding: 12px 15px;
            border: 1px solid #e0e0e0;
            font-size: 0.95rem;
            transition: all 0.2s;
        }
        
        .form-control:focus, .form-select:focus {
            box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
            border-color: #b0b0b0;
        }
        
        .form-label {
            font-weight: 500;
            margin-bottom: 8px;
            color: #444;
            font-size: 0.9rem;
        }
        
        .input-group-text {
            background-color: #f8f9fa;
            border: 1px solid #e0e0e0;
            border-radius: 6px 0 0 6px;
        }
        
        .btn-reservar {
            background-color: #2c3e50;
            color: white;
            border: none;
            padding: 14px 28px;
            border-radius: 6px;
            font-weight: 600;
            transition: all 0.3s;
            font-size: 1rem;
        }
        
        .btn-reservar:hover {
            background-color: #1a252f;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(44, 62, 80, 0.2);
        }
        
        #cupos_disp {
            font-size: 0.85rem;
            padding: 5px 0;
            color: #2c3e50;
        }
        
        .icon-color {
            color: #2c3e50;
        }
        
        .form-section {
            margin-bottom: 1.5rem;
        }
        
        .section-title {
            font-size: 1.1rem;
            color: #2c3e50;
            margin-bottom: 1.2rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid #f0f0f0;
            font-weight: 600;
        }
        
        small.text-muted {
            font-size: 0.8rem;
        }
        
        @media (max-width: 768px) {
            .card-body {
                padding: 20px;
            }
        }





                /* Estilos para el popup personalizado */
        .popup-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 9999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .popup-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        .popup {
            background: white;
            border-radius: 12px;
            width: 90%;
            max-width: 450px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
            overflow: hidden;
            transform: translateY(20px);
            transition: transform 0.3s ease;
        }

        .popup-overlay.active .popup {
            transform: translateY(0);
        }

        .popup-header {
            background: #212121;
            color: white;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .popup-header h3 {
            font-size: 1.3rem;
            margin: 0;
        }

        .close-btn {
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            transition: transform 0.2s;
        }

        .close-btn:hover {
            transform: rotate(90deg);
        }

        .popup-body {
            padding: 25px;
            text-align: center;
        }

        .popup-body p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.5;
        }

        .popup-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
        }

        .popup-btn {
            padding: 10px 20px;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .popup-btn.info {
            background: #4a90e2;
            color: white;
            border: none;
        }

        .popup-btn.info:hover {
            background: #3a80d2;
        }

        .popup-btn.close {
            background: none;
            border: 1px solid #ddd;
            color: #666;
        }

        .popup-btn.close:hover {
            background: #f5f5f5;
        }

        /* Responsive para el popup */
        @media (max-width: 600px) {
            .popup-buttons {
                flex-direction: column;
            }
        }